
    var hua=document.getElementById('one');
    var bi=hua.getContext('2d');
     bi.moveTo(100,100);
     bi.lineWidth='10';
     bi.strokeStyle='red';
     bi.lineCap='round';
     bi.lineTo(70,15);
     bi.lineTo(100,75);
     bi.lineTo(130,15);
     bi.lineTo(190,100)
      bi.moveTo(350,350);
      bi.lineTo(200,150);
      bi.lineTo(350,230);
      bi.lineTo(700,150);
      bi.lineTo(350,350);
      bi.stroke();
